Boston Marathon Bombing

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

A woman is loaded into an ambulance after he was injured by one of two bombs exploded during the 117th Boston Marathon near Copley Square on April 15, 2013 in Boston, Massachusetts. (Credit: Jim Rogash/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

People look on at the corner of Stuart and Dartmouth St., near the finish line after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Credit: Darren McCollester /Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

People rush out of the way on the corner of Stuart and Dartmouth St., near the finish line after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Credit: Darren McCollester/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

Runner John Ounao crying when he finds friends after several explosions rocked the finish of the Boston Marathon in Boston, Massachusetts, on April 15, 2013. (Credit: JOHN MOTTERN/AFP/Getty Images)

Runner John Ounao crying when he finds friends after several explosions rocked the finish of the Boston Marathon in Boston, Massachusetts, on April 15, 2013. At least two people were killed and 22 wounded when two explosions struck near the finish line of the Boston Marathon, sparking scenes of panic, police said. The streets were littered with debris and blood and paramedics raced off with stretchers as police locked down the area, witness said. TV footage showed an explosion sending up a white plume of smoke along the sidelines of the race. AFP PHOTO/John MOTTERN (Photo credit should read JOHN MOTTERN/AFP/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

A police officer directs people around the finish line at the corner of Boylston Street and Massachusetts Avenue after two explosives detonated during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Credit: Darren McCollester/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

A runner sits near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Credit: Alex Trautwig/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

Carlos Arredondo, who was at the finish line of the 117th Boston Marathon when two explosives detonated, leaves the scene on April 15, 2013 in Boston, Massachusetts. (Credit: Darren McCollester/Getty Images)

Carlos Arredondo, who was at the finish line of the 117th Boston Marathon when two explosives detonated, leaves the scene on April 15, 2013 in Boston, Massachusetts. (Credit: Darren McCollester/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

People walk near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Credit: Alex Trautwig/Getty Images)

Boston Marathon Bombings

Runners react near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Credit: Alex Trautwig/Getty Images)

Runners react near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Credit: Alex Trautwig/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

Runners gather near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. Two people are confirmed dead and at least 23 injured after two explosions went off near the finish line to the marathon. (Credit: Alex Trautwig/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

A runner reacts near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Credit: Alex Trautwig/Getty Images)

Boston Marathon explosions

Multiple People Injured After Explosions Near Finish Line at Boston Marathon (Jim Rogash
Getty/Images News)

Explosions At Boston Marathon Finish Line

A runner reacts near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Photo by Alex Trautwig/Getty Images)

A runner reacts near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Photo by Alex Trautwig/Getty Images)

2 Explosions At Boston Marathon Finish Line

A member of the bomb squad investigates a suspicious item on the road near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. Two people are confirmed dead and at least 23 injured after two explosions went off near the finish line to the marathon. (Photo by Alex Trautwig/Getty Images)

2 Explosions At Boston Marathon Finish Line

A runner embraces another woman on the marathon route near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Photo by Alex Trautwig/Getty Images)

BOSTON, MA - APRIL 15:

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

State police guard an area near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Photo by Alex Trautwig/Getty Images)

2 Explosions At Boston Marathon Finish Line

A member of the bomb squad investigates a suspicious item on the road near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Photo by Alex Trautwig/Getty Images)

BOSTON, MA - APRIL 15:

2 Explosions At Boston Marathon Finish Line

(Photo by Alex Trautwig/Getty Images)

2 Explosions At Boston Marathon Finish Line

A woman is loaded into an ambulance after he was injured by one of two bombs exploded during the 117th Boston Marathon near Copley Square on April 15, 2013 in Boston, Massachusetts. (Photo by Jim Rogash/Getty Images)

2 Explosions At Boston Marathon Finish Line

A member of the bomb squad investigates a suspicious item on the road near Kenmore Square after two bombs exploded during the 117th Boston Marathon on April 15, 2013 in Boston, Massachusetts. (Photo by Alex Trautwig/Getty Images)

2 Explosions At Boston Marathon Finish Line

A man is loaded into an ambulance after he was injured by one of two bombs exploded during the 117th Boston Marathon near Copley Square on April 15, 2013 in Boston, Massachusetts. Two people are confirmed dead and at least 23 injured after two explosions went off near the finish line to the marathon. (Photo by Jim Rogash/Getty Images)

2 Explosions At Boston Marathon Finish Line

A man is loaded into an ambulance after he was injured by one of two bombs exploded during the 117th Boston Marathon near Copley Square on April 15, 2013 in Boston, Massachusetts. Two people are confirmed dead and at least 23 injured after two explosions went off near the finish line to the marathon. (Photo by Jim Rogash/Getty Images)

2 Explosions At Boston Marathon Finish Line

A man is loaded into an ambulance after he was injured by one of two bombs exploded during the 117th Boston Marathon near Copley Square on April 15, 2013 in Boston, Massachusetts. Two people are confirmed dead and at least 23 injured after two explosions went off near the finish line to the marathon. (Photo by Jim Rogash/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

BOSTON, MA - APRIL 15: Two blood stained feet of a man hangs outside an ambulance outside a medical tent located near the finish of the 117th Boston Marathon after two bombs exploded on the marathon route on April 15, 2013 in Boston, Massachusetts. (Credit: Jim Rogash/Getty Images)

BOSTON, MA - APRIL 15: Two blood stained feet of a man hangs outside an ambulance outside a medical tent located near the finish of the 117th Boston Marathon after two bombs exploded on the marathon route on April 15, 2013 in Boston, Massachusetts. Two people are confirmed dead and at least 23 injured after two explosions went off near the finish line to the marathon. (Photo by Jim Rogash/Getty Images)

Boston Marathon Bombing

A video grab shows the victims of one of the blasts at the finish line of the Marathon in Boston, Massachusetts on April, 15, 2013. At least two people were killed and 23 others wounded when two explosions struck near the finish line of the Boston Marathon, sparking scenes of panic, police said. (Credit: Marc Hagopian/AFP/Getty Images)

A video grab shows the victims of one of the blasts at the finish line of the Marathon in Boston, Massachusetts on April, 15, 2013. At least two people were killed and 23 others wounded when two explosions struck near the finish line of the Boston Marathon, sparking scenes of panic, police said. AFP PHOTO / Marc Hagopian / AFPTV (Photo credit should read Marc Hagopian/AFP/Getty Images)

2 Explosions At Boston Marathon Finish Line

A man is loaded into an ambulance after he was injured by one of two bombs exploded during the 117th Boston Marathon near Copley Square on April 15, 2013 in Boston, Massachusetts. Two people are confirmed dead and at least 23 injured after two explosions went off near the finish line to the marathon. (Photo by Jim Rogash/Getty Images)

Multiple People Injured After Explosions Near Finish Line at Boston Marathon

The bandaged leg of a man hangs outside an ambulance outside a medical tent located ear the finish of the 117th Boston Marathon after two bombs exploded on the marathon route on April 15, 2013 in Boston, Massachusetts. (Credit: Jim Rogash/Getty Images)

BOSTON, MA - APRIL 15: The bandaged leg of a man hangs outside an ambulance outside a medical tent located ear the finish of the 117th Boston Marathon after two bombs exploded on the marathon route on April 15, 2013 in Boston, Massachusetts. Two people are confirmed dead and at least 23 injured after two explosions went off near the finish line to the marathon. (Photo by Jim Rogash/Getty Images)